Wrench.



"Not 848,058. PATBNTBD MAR. 26, 1907; 5 J. 11n-SHEPHERD. l

WRENCH.

APPLIQATION FILED MAY 25. 1906.

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MIIII x l c Y WJTESSES.-

11W NTO l mam. ,4f/ XM JAlVLES H. SHEPHERD, OF IDAHO SPRINGS, COLORADO.

WRENCH.

Specification of Letters Patent.

Patented March 26, 1907.

Application filed May 25,1906. Serial No. 318.713.

To all whom t may concern,.-

Beit known that I, JAMES H. SHEPHERD, a citizen of the United States ofAmerica, and a resident of Idaho Springs, in the county of Clear Creekand State of Colorado, have invented certain new and useful Improvementsin Wrenches, of which the following is a specification.

This invention relates to certain new and useful improvements inwrenches of that class employing a right and left hand thread formanipulation of the movable jaw; and the present invention has for itsobjects, among others, to provide an improved, simple, and yet strongand efficient wrench in which the parts are few in number and thosecompactly arranged. The handle carries the shank of the iiXed jaw, andupon which the movable jaw slides, and this handle is provided with aportion or extension having a screw-threaded socket in which works oneportion of a right-and-left-hand screw, the other portion working in athreaded cocket in an extension of the movable jaw. The screw isprovided witha nut or the like, by which it may be turned. The shank ofthe fixed jaw is provided with a recess to permit of turning of thisnut, while the screw is provided with an interruption or groove, so asto readily free itself from dirt if any should get into the screw.

Other objects and advantages of the invention will hereinafter appear,and the novel features thereof will be specifically defined by theappended claim.

The invention is clearly illustrated in the accompanying drawings,which, with the numerals of reference marked thereon, form a part ofthis specification, and in which- Figure 1 is an elevation of myimproved wrench. Fig. 2 is an elevational detail with portions brokenaway. Fig. 3 is a cross-section on the line 3 3 of Fig. 2.

Like numerals of reference indicate like parts throughout the severalviews.

Referring now to the drawings, 1 designates the handle carrying theshank 2, terminating at its outer end in the fixed jaw 3.

4 is an extension on the shank 2 at the handle end thereof, and thislateral portion or extension is formed with a screw-threaded socket 5,in which is received one portion or end of the right-and-left screw.

The movable jaw 6 has the guide portion 7, which embraces the shank 2,and this guide portion extends laterally beyond the said shank and isconnected with the movable jaw by the portion 8, and in this saidportion 8 and in the extension of the said guide is a screw-threadedsocket 9, in which is received the other end or portion of theright-and-left screw, as will be clearly seen from Fig. 2.

10 is the screw. Itis formed right and left, the one portion to engagein the socket 5, which is of course correspondingly threaded, and theother to engage in the socket 9, which is correspondingly threaded. Be-

tween the right and left threads of this screw the screw is providedwith suitable means for turning it, in this instance being a nut or diskportion 11, the periphery of which is preferably milled, as shown, andin order that this disk may turn freely without binding against theshank 2, and yet to insure that the parts shall be as compactly arrangedas possible, the face of the shank adjacentthe screw is provided with alongitudinal rounded groove or recess 12, as seen best in Fig. 3.

In order that the screws or the threads above and below the nut or diskmay automatically clear or free themselves from any dirt or foreignsubstance that might lodge therein, I form the same with an'interruption, as seen in Figs. 2 and 3 at 13, which may be in thenature of a small groove extending lengthwise of the screw or otherwise.

Turning of the screw either to the right or left gives rapid, or ratherincreased, motion to the movable jaw. The screw holds the movable jaw inits adjusted positions securely, as will be readily understood. Theshoulders at the ends of the recess 12 serve to limit the movement ofthe disk in its back and forth movements.

The automatic freeing of the screw from dirt may be provided for eitherby the groove in the screw, as above mentioned, or by means ofinterruption of the threads in the extensions 8 and 4, as seen at 14 and15, or both of said provisions may be present, as may be found mostexpedient.

Modifications in detail may be resorted to without departing from thespirit of the invention or sacrificing any of its advantages.

What I claim as new is- In a wrench, a handle having a shank and afixedV jaw, a movable jaw, lateral extensions on said handle and movablejaw having sockets with their threads interrupted in the dirio reotionof the length of the sockets, and a l Signed by ine at Denver, Colorado,this right-and-left screw engaged in the said i 22d da)v of May, 1906.Sockets and provided with grooves extending` y Y i lengthwise of thescrews for eoperation with i JAME 'u' bum' UMRD the interruption of thethreads of the Witnesses:

Sockets whereby the threads automatically L. BLACKMORE,

free themselves from dirt. E. HEDENsKoG.

